Here are the main symptoms of a bad 4L60E shift solenoid.įailure to Downshift– The 4L60E will often fail to downshift if one or more of the shift solenoids are stuck open or closed. This movement is achieved through the creation of a magnetic field within them. This action makes the transmission shift into different gears. Simply put, the shift solenoid has a spring loaded plunger inside of it that will move transmission fluid in and out of different parts of the transmission. Shift solenoids are relatively basic in design and principal. The shift solenoids are the means by which this control is physically achieved within the transmission. This is where the “E” in 4L60E comes from.

The short answer would be that the shift solenoids found within the 4L60E transmission receive instructions from the ECU/TCM to open and close. The good news is, that if you do have a bad one, they’re really inexpensive. The purpose of this article is to help you identify 4L60E shift solenoid symptoms. In the 4L60E, shift solenoid problems can cause a lot of trouble. Modern automatic transmissions use hydraulic fluid, which is activated by solenoids, to shift gears.

4l60e servo assembly symptoms